> NOTICE — Pre-launch build. Every record here is a dated observation of a real MCP endpoint operated by a third party, rendered from the published archive. Coverage is partial — the figures cover the snapshots in the export this build was made from, not the whole chain and not the whole ecosystem. Claims and badges are not open.

# api.ksrnyx.top/oj-mcp/atcoder/mcp

Last observed: 2026-10-02T08:53:07.586Z
Recorded as: OK
Transport: streamable-http
Observations held: 58
Published: yes

## Observations

| Observed | Snapshot | Recorded as | Detail | Latency ms | Tools | Tool schema fingerprint |
|---|---|---|---|---|---|---|
| 2026-08-06T17:54:56.392Z | REL-SNAP-002 | OK | - | 396 | 4 | 6b89a9249e7fca7b4ce1fb27efc510539079f4096443f8ee94b2251a2c115752 |
| 2026-08-07T08:41:00.661Z | REL-SNAP-003 | OK | - | 388 | 4 | 6b89a9249e7fca7b4ce1fb27efc510539079f4096443f8ee94b2251a2c115752 |
| 2026-08-08T10:22:31.849Z | REL-SNAP-004 | OK | - | 781 | 4 | 6b89a9249e7fca7b4ce1fb27efc510539079f4096443f8ee94b2251a2c115752 |
| 2026-08-09T09:03:42.467Z | REL-SNAP-005 | OK | - | 760 | 4 | 6b89a9249e7fca7b4ce1fb27efc510539079f4096443f8ee94b2251a2c115752 |
| 2026-08-10T09:02:23.738Z | REL-SNAP-006 | OK | - | 849 | 4 | 6b89a9249e7fca7b4ce1fb27efc510539079f4096443f8ee94b2251a2c115752 |
| 2026-08-11T09:05:26.231Z | REL-SNAP-007 | OK | - | 800 | 4 | 6b89a9249e7fca7b4ce1fb27efc510539079f4096443f8ee94b2251a2c115752 |
| 2026-08-12T09:04:09.284Z | REL-SNAP-008 | OK | - | 806 | 4 | 6b89a9249e7fca7b4ce1fb27efc510539079f4096443f8ee94b2251a2c115752 |
| 2026-08-13T08:57:45.231Z | REL-SNAP-009 | OK | - | 808 | 4 | 6b89a9249e7fca7b4ce1fb27efc510539079f4096443f8ee94b2251a2c115752 |
| 2026-08-14T09:10:19.505Z | REL-SNAP-010 | OK | - | 1320 | 4 | 6b89a9249e7fca7b4ce1fb27efc510539079f4096443f8ee94b2251a2c115752 |
| 2026-08-15T09:00:51.749Z | REL-SNAP-011 | OK | - | 749 | 4 | 6b89a9249e7fca7b4ce1fb27efc510539079f4096443f8ee94b2251a2c115752 |
| 2026-08-16T09:01:21.373Z | REL-SNAP-012 | OK | - | 778 | 4 | 6b89a9249e7fca7b4ce1fb27efc510539079f4096443f8ee94b2251a2c115752 |
| 2026-08-17T11:32:11.629Z | REL-SNAP-013 | OK | - | 771 | 4 | 6b89a9249e7fca7b4ce1fb27efc510539079f4096443f8ee94b2251a2c115752 |
| 2026-08-18T08:59:49.637Z | REL-SNAP-014 | OK | - | 829 | 4 | 6b89a9249e7fca7b4ce1fb27efc510539079f4096443f8ee94b2251a2c115752 |
| 2026-08-19T08:48:58.409Z | REL-SNAP-015 | OK | - | 690 | 4 | 6b89a9249e7fca7b4ce1fb27efc510539079f4096443f8ee94b2251a2c115752 |
| 2026-08-20T08:57:15.195Z | REL-SNAP-016 | OK | - | 708 | 4 | 6b89a9249e7fca7b4ce1fb27efc510539079f4096443f8ee94b2251a2c115752 |
| 2026-08-21T09:12:59.803Z | REL-SNAP-017 | OK | - | 694 | 4 | 6b89a9249e7fca7b4ce1fb27efc510539079f4096443f8ee94b2251a2c115752 |
| 2026-08-22T08:49:58.981Z | REL-SNAP-018 | OK | - | 764 | 4 | 6b89a9249e7fca7b4ce1fb27efc510539079f4096443f8ee94b2251a2c115752 |
| 2026-08-23T09:50:57.861Z | REL-SNAP-019 | OK | - | 676 | 4 | 6b89a9249e7fca7b4ce1fb27efc510539079f4096443f8ee94b2251a2c115752 |
| 2026-08-24T08:53:15.095Z | REL-SNAP-020 | OK | - | 607 | 4 | 6b89a9249e7fca7b4ce1fb27efc510539079f4096443f8ee94b2251a2c115752 |
| 2026-08-25T08:55:12.717Z | REL-SNAP-021 | OK | - | 736 | 4 | 6b89a9249e7fca7b4ce1fb27efc510539079f4096443f8ee94b2251a2c115752 |
| 2026-08-26T08:51:35.693Z | REL-SNAP-022 | OK | - | 692 | 4 | 6b89a9249e7fca7b4ce1fb27efc510539079f4096443f8ee94b2251a2c115752 |
| 2026-08-27T09:04:28.682Z | REL-SNAP-023 | OK | - | 688 | 4 | 6b89a9249e7fca7b4ce1fb27efc510539079f4096443f8ee94b2251a2c115752 |
| 2026-08-28T09:02:26.642Z | REL-SNAP-024 | OK | - | 785 | 4 | 6b89a9249e7fca7b4ce1fb27efc510539079f4096443f8ee94b2251a2c115752 |
| 2026-08-29T08:52:28.806Z | REL-SNAP-025 | OK | - | 694 | 4 | 6b89a9249e7fca7b4ce1fb27efc510539079f4096443f8ee94b2251a2c115752 |
| 2026-08-30T08:54:28.338Z | REL-SNAP-026 | OK | - | 709 | 4 | 6b89a9249e7fca7b4ce1fb27efc510539079f4096443f8ee94b2251a2c115752 |
| 2026-08-31T08:57:56.069Z | REL-SNAP-027 | OK | - | 681 | 4 | 6b89a9249e7fca7b4ce1fb27efc510539079f4096443f8ee94b2251a2c115752 |
| 2026-09-01T08:52:56.687Z | REL-SNAP-028 | OK | - | 718 | 4 | 6b89a9249e7fca7b4ce1fb27efc510539079f4096443f8ee94b2251a2c115752 |
| 2026-09-02T09:00:04.143Z | REL-SNAP-029 | OK | - | 646 | 4 | 6b89a9249e7fca7b4ce1fb27efc510539079f4096443f8ee94b2251a2c115752 |
| 2026-09-03T09:21:58.575Z | REL-SNAP-030 | OK | - | 685 | 4 | 6b89a9249e7fca7b4ce1fb27efc510539079f4096443f8ee94b2251a2c115752 |
| 2026-09-04T09:10:40.218Z | REL-SNAP-031 | OK | - | 695 | 4 | 6b89a9249e7fca7b4ce1fb27efc510539079f4096443f8ee94b2251a2c115752 |
| 2026-09-05T08:57:38.008Z | REL-SNAP-032 | OK | - | 692 | 4 | 6b89a9249e7fca7b4ce1fb27efc510539079f4096443f8ee94b2251a2c115752 |
| 2026-09-06T09:06:46.153Z | REL-SNAP-033 | OK | - | 666 | 4 | 6b89a9249e7fca7b4ce1fb27efc510539079f4096443f8ee94b2251a2c115752 |
| 2026-09-07T09:21:45.534Z | REL-SNAP-034 | OK | - | 713 | 4 | 6b89a9249e7fca7b4ce1fb27efc510539079f4096443f8ee94b2251a2c115752 |
| 2026-09-08T09:14:22.833Z | REL-SNAP-035 | OK | - | 851 | 4 | 6b89a9249e7fca7b4ce1fb27efc510539079f4096443f8ee94b2251a2c115752 |
| 2026-09-09T09:07:01.674Z | REL-SNAP-036 | OK | - | 698 | 4 | 6b89a9249e7fca7b4ce1fb27efc510539079f4096443f8ee94b2251a2c115752 |
| 2026-09-10T09:01:01.140Z | REL-SNAP-037 | OK | - | 793 | 4 | 6b89a9249e7fca7b4ce1fb27efc510539079f4096443f8ee94b2251a2c115752 |
| 2026-09-11T09:00:10.155Z | REL-SNAP-038 | OK | - | 642 | 4 | 6b89a9249e7fca7b4ce1fb27efc510539079f4096443f8ee94b2251a2c115752 |
| 2026-09-12T08:52:24.607Z | REL-SNAP-039 | OK | - | 1137 | 4 | 6b89a9249e7fca7b4ce1fb27efc510539079f4096443f8ee94b2251a2c115752 |
| 2026-09-13T09:19:34.067Z | REL-SNAP-040 | OK | - | 983 | 4 | 6b89a9249e7fca7b4ce1fb27efc510539079f4096443f8ee94b2251a2c115752 |
| 2026-09-14T09:19:11.543Z | REL-SNAP-041 | OK | - | 644 | 4 | 6b89a9249e7fca7b4ce1fb27efc510539079f4096443f8ee94b2251a2c115752 |
| 2026-09-15T09:11:53.790Z | REL-SNAP-042 | OK | - | 667 | 4 | 6b89a9249e7fca7b4ce1fb27efc510539079f4096443f8ee94b2251a2c115752 |
| 2026-09-16T09:31:51.527Z | REL-SNAP-043 | OK | - | 660 | 4 | 6b89a9249e7fca7b4ce1fb27efc510539079f4096443f8ee94b2251a2c115752 |
| 2026-09-17T09:14:44.240Z | REL-SNAP-044 | OK | - | 660 | 4 | 6b89a9249e7fca7b4ce1fb27efc510539079f4096443f8ee94b2251a2c115752 |
| 2026-09-18T09:10:15.546Z | REL-SNAP-045 | OK | - | 646 | 4 | 6b89a9249e7fca7b4ce1fb27efc510539079f4096443f8ee94b2251a2c115752 |
| 2026-09-19T08:57:05.090Z | REL-SNAP-046 | OK | - | 751 | 4 | 6b89a9249e7fca7b4ce1fb27efc510539079f4096443f8ee94b2251a2c115752 |
| 2026-09-20T09:12:03.738Z | REL-SNAP-047 | OK | - | 691 | 4 | 6b89a9249e7fca7b4ce1fb27efc510539079f4096443f8ee94b2251a2c115752 |
| 2026-09-21T08:51:44.960Z | REL-SNAP-048 | OK | - | 668 | 4 | 6b89a9249e7fca7b4ce1fb27efc510539079f4096443f8ee94b2251a2c115752 |
| 2026-09-22T09:08:48.249Z | REL-SNAP-049 | OK | - | 655 | 4 | 6b89a9249e7fca7b4ce1fb27efc510539079f4096443f8ee94b2251a2c115752 |
| 2026-09-23T09:31:00.935Z | REL-SNAP-050 | OK | - | 655 | 4 | 6b89a9249e7fca7b4ce1fb27efc510539079f4096443f8ee94b2251a2c115752 |
| 2026-09-24T09:24:47.627Z | REL-SNAP-051 | OK | - | 673 | 4 | 6b89a9249e7fca7b4ce1fb27efc510539079f4096443f8ee94b2251a2c115752 |
| 2026-09-25T09:23:58.384Z | REL-SNAP-052 | OK | - | 677 | 4 | 6b89a9249e7fca7b4ce1fb27efc510539079f4096443f8ee94b2251a2c115752 |
| 2026-09-26T09:01:04.215Z | REL-SNAP-053 | OK | - | 1016 | 4 | 6b89a9249e7fca7b4ce1fb27efc510539079f4096443f8ee94b2251a2c115752 |
| 2026-09-27T09:13:36.061Z | REL-SNAP-054 | OK | - | 739 | 4 | 6b89a9249e7fca7b4ce1fb27efc510539079f4096443f8ee94b2251a2c115752 |
| 2026-09-28T09:27:50.170Z | REL-SNAP-055 | OK | - | 1040 | 4 | 6b89a9249e7fca7b4ce1fb27efc510539079f4096443f8ee94b2251a2c115752 |
| 2026-09-29T09:15:27.980Z | REL-SNAP-056 | OK | - | 732 | 4 | 6b89a9249e7fca7b4ce1fb27efc510539079f4096443f8ee94b2251a2c115752 |
| 2026-09-30T09:20:00.987Z | REL-SNAP-057 | OK | - | 736 | 4 | 6b89a9249e7fca7b4ce1fb27efc510539079f4096443f8ee94b2251a2c115752 |
| 2026-10-01T08:56:56.259Z | REL-SNAP-058 | OK | - | 734 | 4 | 6b89a9249e7fca7b4ce1fb27efc510539079f4096443f8ee94b2251a2c115752 |
| 2026-10-02T08:53:07.586Z | REL-SNAP-059 | OK | - | 698 | 4 | 6b89a9249e7fca7b4ce1fb27efc510539079f4096443f8ee94b2251a2c115752 |

## Identity

Record key: api.ksrnyx.top/oj-mcp/atcoder/mcp (the normalised endpoint observed)
Registry names (not anchored — no inclusion proof reaches this field): io.github.ketherworks/atcoder (what the registry said when we swept it, as observed by us — not evidence that the registry was correct, that the name belongs to whoever registered it, or that it still resolves)
Name reported by the server: atcoder-mcp-server (self-reported, unverified, never used as identity)

Each observation carries a merkle leaf in the snapshot it belongs to. The chain
establishes that a root existed by a given time; it does not establish that any
measurement is true.